144 Dr. A. G. Butler on the 



just estimate as to the value of the characters upon which 

 species had been based. 



At the present time the collection of the Natural History 

 ]\luseum, though still far from perfect, possesses long series 

 of the commoner species, and is chiefly weak in those of the 

 Solomon Islands which have been described during the last 

 few years. The generosity of Messrs. Godman and Salvin, 

 whose collection of these butterflies is now incorporated with 

 the National series, has filled up several blanks and greatly 

 improved the representation of some of the more beautiful and 

 rarer species. Therefore, as I have been asked to bring the 

 account of this genus up to date while fresh from its study, I 

 will try to do my best, reducing the synonymy as much as 

 possible. 



1. Delias eucharis. 



Papilio eucharis, Drury, 111. Exot. Ent. ii. pi. x. fi<rs. 5, 6 (1773). 

 Tieris epic/inns, Godart, Enc. M6th. ix. p. 153 (1819). 



Fifty-two examples, of which twenty-four are from the 

 Godman and Salvin collection. Seven other examples are in 

 the Hevvitson series. India and Burma generally. B. M. 



This widely distributed and common species seems to vary 

 very little. 



2. Delias ethira. 



Delias ethira, Doherty, Journ. Asiat. Soc. Beng. iv. p. 262 (1886). 



Berhampore, Ganjam and Khasia Hills (nine examples). 

 B. M. 



Although most nearly related to D. hierte, this species may 

 be regarded as tending to link the latter to D. eucharis. 



3. Delias hierte. 



Delias hierte, Hiibner, Zutr. exot. Schmett. figs. 77, 78 (1818). 



Var. Thyca indica, Wallace, Trans. Eiit. Soc. Lond. 3rd ser. vol. iv. 



p. 351 (1867). 

 Aberr. $ . Thyca devaca, Moore, P. Z. S. 1872, p. 566. 



Forty-three specimens, of which twenty-one are from G. & 

 S. coll.; also five in coll. Hewitson. India, Burma, and 

 Siam. B. M. 



This species is very variable on both surfaces, but espe- 

 cially on the under surface of the secondaries ; the scarlet 

 submarginal spots are always large and seven in number, 

 but they are very well developed in some examples ; the 

 yellow colouring on these wings also varies from lemon to 

 saffron, sometimes even tinged with scarlet on the abdominal 



